Boiler-injector check-turret.



BOILER INJECTOR CHECK TURRET.

APPLICATION FILED MAR.11, 1911.

Patented Oct. 24, 1911.

2 SHEETS-SHEET 1.

P. M. AHEARN & P. s. WINTER.

BOILER INJECTOR CHECK TURRET.

APPLICATION FILED MAR.11, 1911.

Patented Oct. 24, 1911.

2 SHEETS-SHEET 2 COLUMBIA PLANouRAPfi C0-.WASMLNGTON, 0.1:.

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UNTTED BTATS PATENT @FFTCE.

FRANK M. AHEARN; AND PAUL S. WINTER, F GREENVILLE, PENNSYLVANIA.

' BOILER-INJECTOR CHECK-TURRET.

Specification of Letters Patent.

Patented Oct. 24, 1911.

cation.

Our invention relates to injector check turrets of the kind employed to inject feed water into the steam space of a boiler, and our invention consists in an improved form of spraying nozzle which more effectively distributes the feed-Water within the boiler.

In the accompanying drawings, Figure 1 is a top plan view of an injector check turret embodying our improvements. Fig. 2 shows a side elevation thereof. Fig. 3 is a view partly in side elevation and partly in vertical section of the same applied to the shell of a boiler. Fig. 4 is a detail view in vertical section of the spraying nozzle. Fig. -5 shows a transverse section thereof. Fig. 6 shows a plan of the annular flange on the turret casing which receives the attaching bolts. Fig. 7 shows a transverse section through a steam boiler with our improvements applied. Fig. 8 shows in top plan the dry pipe of a boiler and illustrates how the feed-water is distributed by our improved spraying device.

The casing A is formed with a valve chamber A which communicates with a passage B extending through the base B of the casing. This base is prolonged by a part B of smaller diameter which extends into the boiler C, as indicated in Fig. 3. Between the parts B and B there is a shoulder 72 which is tapered and slightly rounded and fits tightly a corresponding socket in the boiler shell 0. The part B is formed with an annular flange B provided with holes I) to receive bolts which engage the shell of the boiler and tightly secure the casing thereto. The casing shown has on opposite sides bosses D formed with threaded openings D which, as shown in Fig. 7, are coupled to check valves E, of usual construction, communicating with the feed-water pipes F through which the feed-water is fed or injected in well known ways.

The top G of the chamber A is preferably formed as shown in Fig. 3, z. e., the top wall is inclined downwardly from the top of the casing, has a central opening, and is threaded at g to receive the lower threaded end of the bonnet H through which extends the valve stem I having a threaded connection at 2' with the bonnet. The valve stem carries a handle K and a valve L which is adapted to fit a valve seat Z formed at the bottom of the chamber A at the top of the part B of the casing. Suitable packing M for the valve stem may be provided and the construction is such that by operating the handle K the valve may be fully opened, as indicated in Fig. 3, or closed tightly upon the valve seat Z to thus cut off communica tion simultaneously between the boiler and both feed pipes. When this is done either or both the check valves E or any of the other parts in the feed-water system may be repaired.

The lower end of the casing A which projects into the boiler is formed to provide a spraying nozzle of improved construction. The passage B communicates with lateral discharge openings N on opposite sides of the nozzle and these openings, as shown in Figs. 7 and 8, are arranged on opposite sides of the longitudinal central line of the boiler. The openingsN are substantially semi-circular. Their upper walls a are straight or horizontal while their lower walls a are inclined downwardly meeting at a knife edge n parallel with the longitudinal central plane of the boiler. Each opening N is preferably divided by a vertical web a into two parts and the lower walls a in addition to being inclined are also preferably curved as shown in Fig. 2. Preferably the walls 01/ are inclined at an angle of 30 to the horizontal but this inclination may be varied to suit different conditions. By the construction shown each opening N becomes more contracted as the curved lower walls extend upwardly and the construction is such as to cause part of the entering water to deflect toward the ends of the boiler as well as to proceed outward toward the sides thereof. The nozzle thus constructed acting in conjunction with gravity prevents the feedwater from being thrown against the inside of the boiler shell and clears the dry pipe. After leaving the nozzle the feed-water is sprayed and spreads into two fan shapes as indicated in Fig. 8. In this condition it passes through the steam at the top of the boiler and becomes thoroughly heated before being deposited upon the water in the boiler and is widely distributed at the water level in an area which is approximately circular and of a diameter about equal to the width of the Water level inside the boiler. In this way no currents of cold water can be formed by the entering feed-water and no cold water can come in contact with the boiler shell.

Any desired number of turrets may be used, each of which may be connected with one or with a plurality of feed pipes.

e claim as our invention:

1. A spraying nozzle for injector check turrets having two horizontally flaring openings provided with inclined lower walls which meet at their upper ends in a horizontally arranged knife edge.

2. A spraying nozzle for injector check turrets having horizontally flaring openings provided with downwardly inclined walls having curved outer edges, the upper portions of said walls being arranged in intersecting planes.

In testimony whereof, we have hereunto subscribed our names.

FRANK M. AI-IEARN. PAUL S. WINTER. lVitnesses:

A. M. ROBERTS, E. B. FRANzoNI.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

